Cholecystitis: Signs of an Infected Gallbladder, Risks and When Surgery Cannot Wait

Cholecystitis is inflammation of the gallbladder — almost always triggered by a gallstone blocking the cystic duct, trapping bile inside, and creating conditions for bacterial infection. It is the next step beyond uncomplicated biliary colic, and it is a step that requires hospital admission, antibiotics, and usually surgery — often urgently. Understanding the difference between a gallbladder attack and a gallbladder infection is important, because the management decisions that follow are very different.

Acute vs Chronic Cholecystitis

Acute cholecystitis is the sudden, severe inflammation of the gallbladder — most commonly when a stone becomes impacted in the cystic duct. The trapped bile becomes infected. Symptoms are more sustained than biliary colic: the pain does not fully resolve after a few hours; there is fever, rigors (shaking chills), and local tenderness over the gallbladder site. Murphy's sign — where pressing under the right rib margin while the patient breathes in causes a sharp, involuntary catch of breath — is a classical clinical finding. Nausea and loss of appetite are prominent.

Chronic cholecystitis is the result of repeated low-grade inflammation over months or years. The gallbladder wall becomes thickened, fibrotic, and scarred — often contracted and poorly functioning. Patients describe years of episodic pain, food intolerance, and bloating. On ultrasound, the gallbladder looks small, thick-walled, and contracted. This is the "long-standing gallbladder disease" presentation that has usually been labelled "gastritis" or "indigestion" for years.

Why Acute Cholecystitis Is an Urgent Situation

Untreated or inadequately treated acute cholecystitis carries serious risks:

• Gangrenous cholecystitis: The gallbladder wall loses its blood supply and dies — risk of rupture is high, mortality is significant
• Gallbladder perforation: Rupture releasing infected bile into the abdominal cavity — causing peritonitis, a life-threatening emergency
• Empyema: The gallbladder fills with pus — requires urgent drainage
• Mirizzi syndrome: A large stone compresses the adjacent bile duct, causing obstructive jaundice — a complex surgical scenario

This is why delaying treatment of acute cholecystitis beyond 72 hours significantly increases the risk of complications and makes surgery technically more difficult. Early operation within the first 48–72 hours of symptom onset is associated with shorter hospital stays and better outcomes compared to delayed surgery.

Treatment: Antibiotics + Surgery

The initial treatment of acute cholecystitis is hospitalisation, intravenous antibiotics, bowel rest (nothing by mouth), and intravenous fluids. This manages the infection and prepares the patient for surgery.

The definitive treatment is laparoscopic cholecystectomy — removal of the infected gallbladder. In suitable patients, this is performed during the same admission, within 48–72 hours of onset. Delaying surgery beyond 72 hours in the hope of "cooling down" the inflammation is now understood to be counterproductive in most cases — inflammation progresses, adhesions form, and the operation becomes technically harder, not easier, with time.

In patients who are too unwell for surgery — severely ill elderly patients with multiple co-morbidities, for example — a temporising procedure called cholecystostomy (drainage of the gallbladder through a percutaneous tube under ultrasound guidance) can relieve the immediate infection until the patient is fit for definitive surgery.

Frequently Asked Questions

What is the difference between biliary colic and acute cholecystitis?

Biliary colic is pain caused by a gallstone transiently blocking the cystic duct — it builds, peaks, and then fully resolves within a few hours as the stone disimpacts. Acute cholecystitis is infection and sustained inflammation of the gallbladder — the pain does not go away, fever develops, and the patient feels systemically unwell. Biliary colic can be managed outpatient with elective surgery planned; acute cholecystitis requires urgent hospital admission.

Can acute cholecystitis be treated with antibiotics alone without surgery?

Antibiotics control the infection temporarily but do not address the underlying stone blocking the cystic duct. Without surgery, the infection will recur — studies show that 30–40% of patients treated with antibiotics alone for acute cholecystitis are readmitted within a year with another episode. Surgery during the same admission remains the standard of care for most patients. Antibiotic-only treatment is reserved for patients who are too medically unfit for any surgical procedure.

How long is the hospital stay for acute cholecystitis treatment?

With early laparoscopic cholecystectomy (within 48–72 hours), most patients are discharged 2–4 days after surgery. Delayed surgery or complicated cases (perforation, gangrenous gallbladder) significantly extend the hospital stay and recovery period — which is another reason why early surgical management is preferred.

Is cholecystitis more dangerous in diabetics?

Yes — diabetic patients with acute cholecystitis are at higher risk of complications, including gangrenous cholecystitis and empyema, because of impaired immune response and reduced ability to localise infection. Diabetic patients with suspected cholecystitis should be hospitalised promptly and blood sugar controlled tightly in the perioperative period. Surgical risk in diabetics is higher than in non-diabetics, which is factored into the pre-operative assessment.